rust/src/test/run-pass/unique-assign-copy.rs

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

pub fn main() {
    let i = ~mut 1;
    // Should be a copy
    let mut j;
    j = copy i;
    *i = 2;
    *j = 3;
    assert *i == 2;
    assert *j == 3;
}